Probing the interplay between factors determining reaction rates on silica gel using termolecular systems.pdf (220.2 kB)
Probing the interplay between factors determining reaction rates on silica gel using termolecular systems
journal contributionposted on 2014-10-28, 14:46 authored by Iain Kirkpatrick, David Worrall, Sian L. Williams, Craig J.T. Buck, Rafael G. Meseguer
In this study we have compared energy and electron transfer reactions in termolecular systems using a nanosecond diffuse reflectance laser flash photolysis technique. We have previously investigated these processes on silica gel surfaces for bimolecular systems and electron transfer in termolecular systems. The latter systems involved electron transfer between three arene molecules with azulene acting as a molecular shuttle. In this study we present an alternative electron transfer system using trans β-carotene as an electron donor in order to effectively immobilise all species except the shuttle, providing the first unambiguous evidence for radical ion mobility. In the energy transfer system we use naphthalene, a structural isomer of azulene, as the shuttle, facilitating energy transfer from a selectively excited benzophenone sensitiser to 9-cyanoanthracene. Bimolecular rate constants for all of these processes have been measured and new insights into the factors determining the rates of these reactions on silica gel have been obtained.
The authors would like to thank EPSRC for funding this project.
Published inPHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
Pages1585 - 1591 (7)
CitationKIRKPATRICK, I. ... et al, 2012. Probing the interplay between factors determining reaction rates on silica gel using termolecular systems. Photochemical and Photobiological Sciences, 11 (10), pp. 1585 - 1591.
Publisher© Royal Society of Chemistry and Owner Societies
- AM (Accepted Manuscript)
Publisher statementThis work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/
NotesThis article was published in the journal, Photochemical and Photobiological Sciences [© Royal Society of Chemistry and Owner Societies]. The definitive version is available at: http://dx.doi.org/10.1039/c2pp25171j